Apparatus for making backing for teeth.



0. M. POLIN. APPARATUS FOR MAKING BAGKINGS FUR TEBTH. APPLIOATION FILED JULYll, 1911.

L01 @N5 l 9i Patented Mar. 5, i912.

A UNITED STATESPATENT ortica.

A.essen naman' roL1n,-or saN 'Luis onrsro, oatnmnnra.l

mamans Fon MAKING naciente Fon rnnrn.

- `Speoicaton of Letters Patent.

Patented Mar. 5, 1912.

Application filed July 11, -191.1. Serial N0. 637,982.

'interchangeable facings, and the object of the invention is to provide an instrument by which such backings can be made quickly and conveniently.

In the accompanying drawing, Figure l is a perspective view of the blank used :for forming the backing; Fig. 2 is a perspective view of the same slotted; Fig. 3 is a frontview ofthe blank for the anchor; Fig. 4 is a perspective view of the same complete; Fig. 5 is a side View of the backing.. with the anchor therein; Fig. 6 is a top View `of the same; Fig. 7 is a rear view of the tooth showing a groove therein; Fig. 8 ,is a perspective view of the toot-h with the backing thereon; Fig. 9 is a side :view of my improved instrument for effecting the operations above indicated Figa l() is a sectional view through the jaw thereof on the line 1o-10 of Fig. 9. i

Referring to the drawing7 3 indicates my improved instrument having jaws 5 and handles 12-for pressing said jaws together. Said jaws are formed with fiat surfaces 4, which contact with each other when the jaws are pressed together, and on one'of said jaws at a side thereof there is secured a punch (i, a suitable' die 7 being formed in the other jaw in a position to coperate .with said punch.

In using this instrument I lirst take a small piece 1- of plate gold of suitable form and size, (see Fig. 3)y and, by means ot the instrument 3, I form said sheet gold into a hollow rib or anchor 9., (Fig. 14). This I do ,by bending the plate goldv and pressing it between lat'surfaces 4 of thev jaws 5 of' said instrument, gradually pressing said surfaces together, and adjusting the position of the piece l, until they. are pressed together .so las lto leave said rib or anchor of the exact form desired. By means of a punch 6 secured to one 'of said jaws 5, and a suit-able die 7 formed in the other jaw, I punch in a blank 9 of vplate gold an elongated hole 8 in the proper position, as shown in Fig. 2. I then insert the anchor 2 in a groove 1G formed in the tooth 11 (Fig. 7 ),'so that the edges of said anchor extend upwardly Vout f of said groove. The anchor `being in this position I the-n press the piece 9 of plate gold on to the inner face of the tooth, passing the slot 8 over the npturning edges of the anchor, and pressing or bnrnishing the plate gold on to the tooth. I then solder on to said plate gold the edges of the anchor which extend slight-ly through said slot and the operation is complete.

I claim An instrument for forming backings for interchangeable teeth, having jaws, and

means for pressing said jaws together, said jaws having in one portion of each respectively a punch and a die for forming a slot in plate metal, and in another lportion thereof, two opposing flat surfaces adapted to press tightly together folded over por'-' tions of plate metal to form an anchor.

In testimony whereof I have hereunto set my hand in the presence lof two subscribing witnesses. v

OSCAR MARTIN POLIN.

lVitnesses R. R. LESLIE, F J SILVA. 

